Abstract A high-voltage blow-piston disconnect apparatus, for use with an electron-negative gas such as sulfurhexafluoride and the like as an arc extinguishing and insulating gas has a blow-piston disconnect switch which in turn has contacts across which an arc develops when the switch opens under load. The disconnect switch includes a blast mechanism for blasting a quenching stream of the gas across the contacts for extinguishing the arc. A filter is connected to the disconnect switch for removing dissociation products produced when the gas extinguishes the arc. A pump is connected with the filter and the disconnect switch for pumping the gas through the filter independent of the quenching stream, whereby the dissociation products are removed from the gas by the filter.
A blow-piston disconnect apparatus according to claim 1, comprising time control means connected to said pump means for operating the latter in time dependence.
Claim 2
Dependent Claim
85 words
A blow-piston disconnect apparatus according to claim 1 wherein said disconnect switch comprises actuating means connected to at least one of said contacts for moving the same to separate said contacts, said apparatus comprising time control means connected to said pump means for operating the latter, said time control means being responsive to said movement for starting the operation of said pump means, said time control means including turn-off means for stopping the operation of said pump means after a predetermined operating time has elapsed.
Claim 3
Dependent Claim
20 words
A blow-piston disconnect apparatus according to claim 1 wherein a plurality of said disconnect switches are pneumatically connected in series.
Claim 4
Dependent Claim
26 words
A blow piston disconnect apparatus according to claim 1, said apparatus comprising a two-pressure gas breaker, said pump means being a compressor connected to said breaker.
Claim 5
Dependent Claim
147 words
A high-voltage metal-clad circuit breaker installation for use with an electron-negative gas such as sulfurhexafluoride and the like as an arc extinguishing and insulating gas, said apparatus comprising a blow-piston disconnect switch having contacts across which an arc develops when said disconnect switch opens under load, said disconnect switch including blast means for blasting a quenching stream of the gas across said contacts for extinguishing said arc, a filter connected to said disconnect switch for removing dissociation products produced when the gas extinguishes said arc, a two-pressure gas circuit breaker pneumatically connected with said filter and said disconnect switch, pump means connected with said filter, said circuit breaker and said disconnect switch for pumping said gas through said filter independent of said quenching stream, whereby the gas flow through said filter in removing said dissociation products is substantially less than the gas flow of said quenching stream.